Many engineering applications employ halogenated polymeric materials and compounds. The halogen group contains bromine, chlorine, fluorine, iodine, and astatine. Manufacturers add brominated flame retardants (BFRs) or chlorinated flame retardants (CFRs) to plastic materials, including thermoplastics, solder masks, insulation materials, printed board laminates, etc., to obtain necessary flame retardancy. Additionally, cable jacketing and vibration-damping materials frequently employ polyvinyl chloride (PVC) as their basic resin.

There are different standards regulating halogenated compounds, including:

IEC 61249-2-21:2003 – Materials for printed boards and other interconnecting structures – Part 2-21: Reinforced base materials, clad and unclad – Non-halogenated epoxide woven E-glass reinforced laminated sheets of defined flammability (vertical burning test), copper-clad

JS709C – Joint JEDEC/ECA standard, definition of “low-halogen” for electronic products

Standard IPC-4101E – Specification for Base Materials for Rigid and Multilayer Printed Boards

Standard UL 746E – Polymeric Materials — Industrial Laminates, Filament Wound Tubing, Vulcanized Fibre, and Materials Used in Printed Wiring Boards

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